John Gibson - Expositor's Bible - The Gospel of Matthew

Life and Times of Jesus the Messiah , vol. i., p. 130.

It is worthy of notice that He has had the same experience even in Galilee as before, for He is cast out of His own place Nazareth, so that He cannot really begin there. He gave them the first opportunity in Galilee as He had given Jerusalem first of all, but they too had rejected it, had driven Him out, and hence it is that the beginning was not in the village up in the hills, but down by the lakeside in the midst of the busy life that thronged its shores.

It is true that under the head of oaths comes the duty of reverence, which scarcely seems to fall under this head; but it will be remembered that this point comes in by way of a very natural suggestion in dealing with falsehood and the regulation of conversation, which evidently belongs to righteousness as between man and man.

This complete change of meaning, amounting in fact to the destruction and almost to the inversion of the sense, is one of many illustrations of the absolute need of revision from time to time of translations, not only to make them more correct, but even to keep them as correct as they were at first.

Duty of course in its largest sense – to God and man and self – including all "righteousness" in the Master's sense of the word.